.page-form {    
    width: 100%;
}
.login-form {
    margin: 0 auto;
    width: 600px;
    height: 355px;    
}
.login-form .header-form {
    text-align: center;
    color: #1480c8;
    font-size: 46px;
    font-family:"Tahoma", Times, serif;
    font-weight: bold;
}
.login-form .header-form-description {
    text-align: center;
    width: 100%;
}